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Method suitable for evaluating ratchet effect of submarine pipeline

A subsea pipeline and effect technology, applied in special data processing applications, instruments, design optimization/simulation, etc., can solve problems such as lack of quantitative analysis and evaluation, lack of clear ratchet effect, and conservative design results.

Pending Publication Date: 2022-06-28
OFFSHORE OIL ENG
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Problems solved by technology

In the field of submarine pipeline engineering design, the current domestic and foreign standard code systems do not provide a clear evaluation method for the impact of the ratchet effect. In engineering design, a certain design margin is usually considered on the basis of thermal expansion displacement, and there is a lack of quantitative analysis and evaluation. so that the design results are conservative

Method used

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  • Method suitable for evaluating ratchet effect of submarine pipeline
  • Method suitable for evaluating ratchet effect of submarine pipeline
  • Method suitable for evaluating ratchet effect of submarine pipeline

Examples

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the invention.

[0038] like Figure 1 to Figure 3 As shown, the present invention discloses a method suitable for assessing the ratchet effect of submarine pipelines, and the specific implementation of each step is as follows:

[0039] Take the export submarine pipeline project in the 36-inch single point mooring system as a case:

[0040] 1. Determine the flow guarantee requirements for the full service period of the submarine pipeline 2. The design temperature is 55°C, the maximum operating temperature is 45°C, and the design pressure is 4.2MPa.

[0041] 2. Determine the pipe-soil interaction data of the entire route of the submarine pipeline 2, including the axial soil friction coefficient, lateral s...

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Abstract

The invention discloses a method suitable for evaluating the ratchet effect of a submarine pipeline, and the method aims at the ratchet effect risk generated during the service period of the submarine pipeline, and combines the flow guarantee requirements of the submarine pipeline and the influence of the pipe-soil effect. The screening and distinguishing method and the finite element evaluation method for the submarine pipeline ratchet effect based on the induction mechanism are innovatively provided, so that engineering design better conforms to the real service state of the submarine pipeline, good application and popularization value is achieved in engineering practice, and the blank in the related engineering design field in China is filled.

Description

technical field [0001] The invention relates to the technical field of marine engineering design, in particular to a method suitable for assessing the ratchet effect of a submarine pipeline. Background technique [0002] The ratchet effect widely exists in submarine pipelines with frequent shutdown operations during service, which affects the in-position status and structural safety of submarine pipelines. During the operation period, the submarine pipeline will often be shut down according to the needs of the operation, and the cyclic load generated by repeated start-up and shutdown operations will affect the in-position status of the submarine pipeline, and induce the submarine pipeline to Create a ratchet effect. At present, the research on the ratchet effect at home and abroad is mainly concentrated in the field of materials, and there are few researches on the ratchet effect in submarine pipeline engineering. In the field of submarine pipeline engineering design, the ...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F113/14G06F119/08G06F119/14
CPCG06F30/23G06F2119/14G06F2119/08G06F2113/14Y02T90/00
Inventor 孙国民李庆黄钰王乐芹杨琥倪自强熊海荣余志兵
Owner OFFSHORE OIL ENG
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